EC1305 Transmission Lines Waveguides Syllabus

AIM
To lay a strong foundation on the theory of transmission lines and wave guides by highlighting their applications.

OBJECTIVES
• To become familiar with propagation of signals through lines
• Understand signal propagation at Radio frequencies
• Understand radio propagation in guided systems
• To become familiar with resonators

UNIT I TRANSMISSION LINE THEORY 9
Different types of transmission lines – Definition of Characteristic impedance – The transmission line as a cascade of T-Sections - Definition of Propagation Constant.
General Solution of the transmission line – The two standard forms for voltage and current of a line terminated by an impedance – physical significance of the equation and the infinite line – The two standard forms for the input impedance of a transmission line terminated by an impedance – meaning of reflection coefficient – wavelength and velocity of propagation.
Waveform distortion – distortion less transmission line – The telephone cable – Inductance loading of telephone cables.
Input impedance of lossless lines – reflection on a line not terminated by Zo - Transfer impedance – reflection factor and reflection loss – T and ∏ Section equivalent to lines.

UNIT II THE LINE AT RADIO FREQUENCIES 9
Standing waves and standing wave ratio on a line – One eighth wave line – The quarter wave line and impedance matching – the half wave line.
The circle diagram for the dissipationless line – The Smith Chart – Application of the Smith Chart – Conversion from impedance to reflection coefficient and vice-versa. Impedance to Admittance conversion and viceversa – Input impedance of a lossless line terminated by an impedance – single stub matching and double stub matching.